Bug #40796 : adding the tests to the experimental pb2 set.

mysql-test/collections/default.experimental

@@ -2,3 +2,8 @@ funcs_1.charset_collation_1              # depends on compile-time decisions
 binlog.binlog_tmp_table                  # Bug#45578: Test binlog_tmp_table fails ramdonly on PB2: Unknown table 't2'
 main.ctype_gbk_binlog                    # Bug#46010: main.ctype_gbk_binlog fails sporadically : Table 't2' already exists
 rpl.rpl_row_create_table                 # Bug#45576: rpl_row_create_table fails on PB2
+rpl.rpl_extraColmaster_myisam            # Bug#46013: rpl_extraColmaster_myisam fails on pb2
+rpl.rpl_stm_reset_slave                  # Bug#46014: rpl_stm_reset_slave crashes the server sporadically in pb2
+rpl_extraCol_myisam                      # Bug#40796
+rpl_extraColmaster_innodb                # Bug#40796
+rpl_extraCol_innodb                      # Bug#40796